The second one was a J2 fic, this one was a longer fic, but my memories are vaguer. They're in some sort of containment center, though Jared's section includes an area outdoors. Jensen ends up in Jared's area because some of the other inmates dumped him there, I think. I know that Jared is feral and someone, the government maybe, is using him as an assassin. Jared latches onto Jensen and everyone is surprised that Jared doesn't kill him. I *think* they have sex, but I'm not sure. Jensen ends up becoming a stabilizing influence on Jared, I think through a mental bond? And then they both end up escaping. That's not quite the end but I don't remember what happens after that. Also, I have read Feral by riyku and while it is a bit similar it is not the fic I'm looking for.
-FOUND! Link is in the comments.
Do either of these fics sound familiar?